EP 1465192 A1 20041006 - Method for detection of acoustic events in audio signals
Title (en)
Method for detection of acoustic events in audio signals
Title (de)
Verfahren zur Detektion von Schallereignissen in Audiosignalen
Title (fr)
Procédé de détection d'événements acoustiques dans des signaux audio
Publication
Application
Priority
EP 03290838 A 20030404
Abstract (en)
A method for detecting acoustic events in audio signals is presented, which compares the shape of an audio signal to be detected to a predetermined reference shape. The search is effected within a floating window, which is moving across the whole length of the audio recording. For comparison, the shape of the audio signal inside the floating window is approximated by a basic shape. The basic shape is constructed using basic geometrical shapes, such as squares and triangles. Furthermore, the occurrence of peak amplitudes of the signal inside the window is compared to a predetermined pattern of peak amplitudes. Additionally, a frequency spectrum analysis is performed inside the window. The frequency spectrum is compared to the known frequency spectrum of the acoustic event searched for. The results of the comparisons are combined and a signal is issued upon detecting the acoustic event. <IMAGE>
IPC 1-7
IPC 8 full level
G11B 27/10 (2006.01); G11B 27/28 (2006.01); G11B 27/30 (2006.01)
CPC (source: EP)
G10H 1/00 (2013.01); G11B 27/10 (2013.01); G11B 27/28 (2013.01); G11B 27/3036 (2013.01)
Citation (search report)
- [X] EP 0969399 A2 20000105 - IBM [US]
- [X] US 3919479 A 19751111 - MOON WARREN D, et al
- [X] US 6185527 B1 20010206 - PETKOVIC DRAGUTIN [US], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 03290838 A 20030404